Broan Heated Fan Control Kit Installation guide

Brand: Broan

Model: Heated Fan Control Kit

Type: Installation guide

Model Series M1B, M1G, and M1S Furnaces

Installation Instructions

Heated Fan Control Kit

IMPORTANT: Read all instructions carefully before starting

the installation.

General

These instructions are primarily intended to assist qualified

individuals experienced in the proper installation of heating

appliances. Some local codes require licensed installation/

service personnel for this type of equipment.

This kit is designed for use on the NORDYNE series M1B,

M1G, and M1S furnaces. Once installed, this kit will

reduce the main-air blower on delay at the start of a heating

cycle. Furthermore, this kit will increase the main-air

blower off delay at the end of a heating cycle.

Note: It is recommended that a qualified serviceman or

technician perform the installation of this kit.

5. Remove the screw that secures the fan switch to the

unit and remove the fan switch. Keep the screw, but

discard the fan switch.

6. Install the heated fan switch provided with the kit using

the screw removed in the previous step.

7. Reconnect the black and orange wires that were

removed earlier from the fan switch to the two ¼” quick-

connect terminals on the heated fan switch. Refer to

the wiring diagram in Figure 1 for more details.

8. Locate the main-air limit switch inside of the control

area. This limit has two terminals. Connected to one

terminal is a wire that runs from the auxiliary limit

switch. The other terminal has a wire that runs from “W”

on the thermostat.

9. Disconnect the wire connected to the main-air limit

switch that runs from the auxiliary limit.

10. Connect the blue wire with the piggy-back terminal

from the heated fan switch to the terminal of the main-

air limit switch from which the wire was removed in the

previous step.

11. Connect the wire from the auxiliary limit switch to the

piggy back terminal of the blue wire from the heated fan

switch.

12. Disconnect the wire from the common terminal of the

low voltage (24V) side of the transformer.

13. Connect the gray wire from the heated fan switch to the

common terminal of the low voltage (24V) side of the

transformer.

14. Connect the wire that was removed earlier from the

common terminal of the transformer to the piggy-back

terminal on the gray wire from the heated fan switch.

15. Ensure that all electrical connections are secure

and tight.

16. Replace the control panel cover.

Operating the Furnace

1. Turn on all electrical power to the furnace.

2. Remove the furnace door.

3. For gas burners, push in the gas control lever and move

to “ON”. DO NOT FORCE LEVER.

4. For oil burners, turn on the fuel supply to the furnace

using the manual shut-off valve.

5. Follow the start-up and lighting procedures outlined in

the Installation Instructions for the furnace.

WARNING:

Warning: Prior to installation, shut “OFF” all

fuel and electrical power supplies to the

furnace.

Installing the Kit

To Turn Off the Fuel Supply to the Furnace:

1. Set the thermostat to “OFF” or to its lowest setting.

2. Turn “OFF” all electrical power to the furnace.

3. Remove the furnace door.

4. For gas burners, push in the gas control lever and move

to “OFF”. DO NOT FORCE LEVER.

5. For oil burners, shut off the fuel supply to the furnace

using the manual shut-off valve.

Replacing the Fan Switch

1. Follow the instructions “To Turn Off the Fuel Supply to

the Furnace”.

2. Remove the control panel cover.

3. Locate the fan switch inside of the control area. Refer

to the wiring diagram on the unit for more details on the

location of the fan switch.

4. Remove the black and orange wires from the fan

switch.

¢7077640L¤

7077640

St. Louis, MO

7077640

Specifications and illustrations subject to change

without notice and without incurring obligations.

Printed in U.S.A. (11/98)

HI-LIMIT SWITCH

HEATED FAN SWITCH

BLACK

BLACK WHITE

GRAY

RED

GRAY

GREEN

ORANGE

GROUND

SCREW

TRANSFORMER

115V

24V

WHITE

BLUE

DESIGNATES LINE VOLTAGE (115V)

DESIGNATES LOW VOLTAGE (24V)

TO AUXILIARY LIMIT

Broan Heated Fan Control Kit Installation guide

Broan Heated Fan Control Kit Installation guide

Broan Heated Fan Control Kit Installation guide

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